Frog Ninja of silent lakes

Frog Ninja of silent lakes enters the battlefield with
5 silent tokens
Frog Ninja of silent lakes power and toughness are equal to the number of silent tokens on it
{t}: put one silent token on Frog Ninja of silent
lakes
{t}{x}: put {x} silent tokens on Frog Ninja of silent
lakes where {x} is the number of mana you used
to cast this spell